The hadoop 0.20.X move hadoop-dite.xml to core-site.xml and hdfs-site.xml,
etc.
The tutorial claims in requirement ：This version of HBase will only
run on Hadoop
0.20.x <http://hadoop.apache.org/core/releases.html>.
But in the “Fully-Distributed Operation” chapter，the tutorial still
mentions：
- Add a pointer to your HADOOP_CONF_DIR to CLASSPATH in hbase-env.sh
- Add a copy of hadoop-site.xml to ${HBASE_HOME}/conf, or
- If only a small set of HDFS client configurations, add them to
hbase-site.xml
where is hadoop-site.xml ?
